Reference
https://velog.io/@exploit017/2020-%ED%94%84%EB%A1%A0%ED%8A%B8%EC%97%94%EB%93%9C-%EA%B0%9C%EB%B0%9C%EC%9E%90-%EB%A1%9C%EB%93%9C%EB%A7%B5 https://github.com/devJang/developer-roadmap/blob/master/pdf/frontend.pdf
